President Donald Trump revealed information in his meeting with Russian diplomats that was so sensitive that it may jeopardize a critical source of intelligence on Islamic State, the Washington Post reported, citing current and former U.S. officials. The partner had not given the United States permission to share the material with Russia, the report said. The identification of the location where the threat was detected was seen as particularly problematic, officials said, because Russia could use that detail to help identify the U.S. ally or intelligence capability involved, according to the report.

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